Five high-end bicycle thefts in the past 10 days have prompted Summit County Sheriff Jaime FitzSimons to ask bike owners to be especially careful where they store and lock their bikes.

The bikes have been stolen from areas near Summit Cove and Keystone. Without exception, all of the stolen bikes were locked and the suspect cut the locks and chains to remove the bike, FitzSimons said. The stolen bikes have been taken overnight and during daylight morning hours. They have been taken from porch railings, bike racks and car roof racks.

The suspect appears to have some knowledge of bicycles: In a couple of thefts, a high-end bike was locked up but a nearby less-expensive bike was untouched, FitzSimons said.

The sheriff said owners should lock their bicycles in a commonly used, well-lit area that is under surveillance. The bike frame and wheels should be locked to an immovable object. Bikes should also be kept in the house or garage if possible, FitzSimons said.

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